The angle of elevation of the top of a tower from a point on the horizontal ground, 40m away from the foot of the tower is 30o. Find the height of the tower.

At a point 500m from the base of a water tank the angle of elevation of the top of the tank is 45o. Find the height of the tank,

Find the median of the following set of numbers: 28, 29, 39, 38, 33, 37, 26, 20, 15, 25

The table above shows the scores of a group of 40 students in a physics test.

If the mode is m and the median is n, then (m,n) is